凝胶渗透色谱-气相色谱/质谱法同时测定食用油中22种邻苯二甲酸酯

建立了凝胶渗透色谱-气相色谱/质谱法同时测定食用油中22种邻苯二甲酸酯的方法.方法具有良好线性,相关系数R均大于0.999,检测限在0.09～11.83 mg/kg之间,平均回收率在81.45％～113.90％范围内,相对标准偏差为1.55％～9.41％.采用该方法对国内食用油中邻苯二甲酸酯增塑剂进行检测,实际样品中检出邻苯二甲酸二异丁酯、邻苯二甲酸二丁酯和邻苯二甲酸二(2-乙基)己酯,可满足目前食用油中邻苯二甲酸酯的检测要求.

Simultaneous Determination of 22 Phthalate Acid Esters in Edible Oils by Gas Chromatography/Mass Spectrometry Coupled with Gel Permeation Chromatography

A method for the simultaneous determination of 22 phthalate acid esters in edible oils by gas chromatography-mass spectrometry coupled with gel permeation chromatography was developed.The correlation coefficients(R) of 22 phthalate acid esters were over 0.999 with detection limits from 0.09~11.83 mg/kg.The average recoveries of 22 phthalate acid esters in edible oils were ranged from 81.45%~113.90%.In addition,the relative standard deviations(RSDs) were in the range of 1.55%~9.41%.The level of phthalate acid esters plasticizers in edible oils was investigated by this method,and di-iso-butyl phthalate,dibutyl phthalate,bis(2-ethylhexyl) phthalate were found in some real samples.The simplicity,sensitivity and precision of the method made it be well suitable for the analysis of phthalate acid esters in edible oils.